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K-type suspected variable star in the constellation Aquarius From Wikipedia, the free encyclopedia
HD 221148 is suspected variable star in the equatorial constellation of Aquarius. The spectrum of the star shows exceptionally strong levels of CN; one of the highest cyanogen indices measured.[4]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Aquarius |
Right ascension | 23h 29m 32.08207s[1] |
Declination | −04° 31′ 57.8915″[1] |
Apparent magnitude (V) | 6.26[2] |
Characteristics | |
Spectral type | K3IIIv[3] |
U−B color index | +1.20[2] |
B−V color index | +1.10[2] |
Astrometry | |
Radial velocity (Rv) | −26.53±1.94[3] km/s |
Proper motion (μ) | RA: +181.03[1] mas/yr Dec.: −232.23[1] mas/yr |
Parallax (π) | 21.14 ± 0.56 mas[1] |
Distance | 154 ± 4 ly (47 ± 1 pc) |
Details | |
Radius | 5[3] R☉ |
Luminosity | 8.9[3] L☉ |
Surface gravity (log g) | 3.1[3] cgs |
Temperature | 4,592[3] K |
Metallicity [Fe/H] | +0.11[3] dex |
Rotational velocity (v sin i) | 2.2[3] km/s |
Other designations | |
Database references | |
SIMBAD | data |
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